Not compatible with HTTP proxies

[derhansen]

The extension uses a custom REST client to perform Cleverreach requests. This implementation does however not respect any anything set in $GLOBALS['TYPO3_CONF_VARS']['HTTP'] and does therefore not work, if TYPO3 uses a proxy for outgoing HTTP requests.

I recommend to use the TYPO3 API (RequestFactory - see https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ExtensionArchitecture/HowTo/RestRequests/Index.html) for HTTP requests which always ensures, that configured HTTP settings are applied.